Hello! It's great to hear that you're planning a trip to Sliema, Valletta, and Comino. Here are some detailed travel tips.

Best Time to Visit:
The best time to visit Sliema, Valletta, and Comino in Malta is during spring (April to June) and autumn (September and October). During these times, the weather is quite pleasant and perfect for sightseeing.

Route and Accessibility:
The most convenient way to reach Sliema from abroad is by air. Malta International Airport is the nearest airport. From there, you can take a bus or taxi to Sliema. To reach Valletta and Comino, regular ferries are available from Sliema and vice versa.

Accommodation and Booking:
There's a wide variety of accommodation to choose from in Sliema, Valletta, and Comino. It's recommended to book in advance, especially during peak season. Online travel agencies like Booking.com, Airbnb, and Expedia are good options.

Clothing and Essentials:
Pack light clothing for the day and a light jacket for cooler evenings. Don't forget your swimsuit, sunscreen, hats, and comfortable shoes for walking. Also, pack a reusable water bottle to stay hydrated.

Health and Safety:
Healthcare facilities in Malta are of a high standard. However, it's recommended to have travel insurance for any unexpected situations. As safety precautions, avoid isolated areas at night and keep your valuables secure.

Local Etiquette and Respect:
Maltese people are generally relaxed and welcoming. Tipping is customary in restaurants. Respect local customs and traditions, especially when visiting places of worship.